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Catalyst composition, activity and selectivity evolution of Fe-based catalysts during the formation phase in Fischer-Tropsch synthesis

Title data

Thiessen, Johannes ; Rößler, Stefan ; Jess, Andreas:
Catalyst composition, activity and selectivity evolution of Fe-based catalysts during the formation phase in Fischer-Tropsch synthesis.
2016
Event: DGMK Conference "Catalysis - Novel Aspects in Petrochemistry and Refining" , 26.-28.09.2016 , Berlin, Deutschland.
(Conference item: Conference , Poster )

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Abstract in another language

Even though the Fischer-Tropsch synthesis (FTS) process is a mature technology that is currently being used for the production of synthetic fuels and other chemicals in industrial scale in several countries in the world, it is still not definitely known which is (or are) the active phase(es) catalyzing the reaction. Knowledge of the active phase thereby could have great advantages for designing a catalyst with optimal selectivity, durability, and activity. Determining the active phase, however, is challenging as FTS – catalysts (especially iron based) undergo restructuring processes during the reaction.
In this study, we examine in operando the development of the composition of two iron based catalysts during the formation period in Fischer-Tropsch synthesis under near to industrial reaction conditions (pH2 = 6 bar, pCO = 3 bar T = 220°C). Prior to the exposure to synthesis gas (CO/H2) the activation procedure was varied.
The formation of the Fe-containing phases in the catalysts, an industrial precipitated FT-catalyst (ARGE – catalyst) and a sintered Fe-catalyst were monitored via X-ray diffraction. Additionally, the activity and selectivity of the catalysts were measured in a lab scale fixed bed reactor using the same activation and reaction conditions as in the XRD-Measurements.
Differences in the formation of iron carbide phases, activity and selectivity in dependency of the reductive pre-treatment and catalyst synthesis method were identified.

Further data

Item Type: Conference item (Poster)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Faculties
Research Institutions
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 07 Nov 2016 09:25
Last Modified: 07 Nov 2016 09:25
URI: https://eref.uni-bayreuth.de/id/eprint/35068